CN109804527A - Charger - Google Patents

Charger Download PDF

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Publication number
CN109804527A
CN109804527A CN201680090005.5A CN201680090005A CN109804527A CN 109804527 A CN109804527 A CN 109804527A CN 201680090005 A CN201680090005 A CN 201680090005A CN 109804527 A CN109804527 A CN 109804527A
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CN
China
Prior art keywords
circuit
signal
charging
charger
switching device
Prior art date
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Granted
Application number
CN201680090005.5A
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Chinese (zh)
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CN109804527B (en
Inventor
于文超
文冲
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of CN109804527A publication Critical patent/CN109804527A/en
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Publication of CN109804527B publication Critical patent/CN109804527B/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A kind of charger, the charger detects signal by detection signal generating circuit (300) active transmission, feed circuit (500) detects the level signal on Sampling device (400), feedback signal is generated according to level signal, switching device (100) controls charger according to the feedback signal and exports charging voltage, when the level signal meets preset condition, (preset condition is preset, when charging interface (700) occurs abnormal short-circuit, the condition that level signal is met), the switching device (100) controls the charger and stops output charging voltage, to realize whether the charging interface (700) of active detecting charger occurs to cause exception caused by impedance reduction extremely short-circuit because of water inlet or foreign matter, effectively avoids the problem that charger or be electrically charged equipment damage.

Description

Charger Technical field
The present invention relates to circuit field more particularly to a kind of chargers.
Background technique
With the continuous development of mobile terminal, the especially continuous development of mobile phone, the security performance of charger (adapter) is required constantly to be promoted.The output terminal of the charging cable of charger and the input interface of mobile terminal make the cable when adapter is powered generate heat, or even burn cable often since water inlet or other foreign matters cause impedance to be lower.This problem becomes current mainstream cell phone manufacturer main problem urgently to be resolved.
The method processing that the water inlet that current common mobile phone uses is reminded is abnormal, when charge port has it is water stain when, changed by detection port voltage, reminded immediately.However, which can only remind, protection act not can be carried out, and it is poor to detect precision, rate of false alarm is high, if user does not notice promptings, continuing charging still will lead to cable fever even damage.
Summary of the invention
The method that the application is used for charger according to provided by some embodiments and detects charging interface short circuit, since water inlet or other foreign matters cause cable to generate heat, even burn when solving the problems, such as that adapter is powered.
Charger provided by the embodiment of the present invention and charging method for detecting abnormality, it is unrelated with the working condition of charger, when there is electronic equipment connect with charger, it may be assumed that when charger is electronic equipment charging；Or it is connect without electronic equipment with charger, it may be assumed that equally applicable when charger is in light condition.
On the one hand, the application provides a kind of charger according to some embodiments, wherein the charger includes: detection signal generating circuit, Sampling device, feed circuit, switching device, charging circuit and charging interface；The charging interface includes data transmission pin and power pin；The charging circuit receives power supply input signal, and generates the charging voltage according to the power supply input signal, and the charging voltage is exported through the power pin；The detection signal generating circuit is for exporting detection signal, the detection signal hair The output end of raw circuit is connect with data transmission pin；The Sampling device is serially connected with the output line of the detection signal generating circuit；The feed circuit is connect with the Sampling device and the switching device, generates feedback signal for detecting the level signal at the Sampling device both ends, and according to the level signal, the feedback signal is passed to switching device；The switching device is serially connected with the power input line of the charging circuit or is serially connected with the connecting line of the charging circuit Yu the power pin, the switching device controls the charger according to the feedback signal and exports charging voltage for receiving the feedback signal；Wherein, when the level signal meets preset condition, the feed circuit generates the first feedback signal, and the switching device controls the charger according to first feedback signal and stops output charging voltage；When the level signal is unsatisfactory for the preset condition, the feed circuit generates the second feedback signal, and the switching device controls the charger according to second feedback signal and exports charging voltage.
In conjunction with some embodiments above, the charger detects signal by detection signal generating circuit active active transmission, feed circuit detects the level signal on Sampling device, feedback signal is generated according to level signal, switching device controls charger according to the level signal and exports charging voltage, when the level signal meets preset condition, (preset condition is preset, when charging interface occurs abnormal short-circuit, the condition that level signal is met), the switching device controls the charger and stops output charging voltage, to which whether the charging interface of active detecting charger is abnormal short circuit (because water inlet or foreign matter cause impedance to reduce extremely), effectively avoids the problem that charger or be electrically charged equipment damage.
In some embodiments, the switching device is by being serially connected with the connecting line of the charging circuit Yu the power pin, control the connection between the charging circuit and the power pin, wherein, the switching device disconnects the connection of the charging circuit Yu the power pin according to first feedback signal, the power pin stops output charging voltage, so that the charger be made to stop output charging voltage；The switching device connects the connection of the charging circuit Yu the power pin according to second feedback signal.
In further embodiments, the switching device is by being serially connected with the power input line of the charging circuit, control the input of the power supply input signal of the charging circuit, wherein, the switching device disconnects the input path of the power supply input signal of the charging circuit according to first feedback signal, the charging circuit stops generating charging voltage, so that charger be made to stop output charging voltage；The switching device connects the input path of the power supply input signal of the charging circuit according to second feedback signal.
In some embodiments, the switching device is pwm circuit, and the pwm circuit is for generating pwm signal, and the pwm circuit is by being serially connected with the power input line of the charging circuit, the input of the power supply input signal of the charging circuit is controlled, generates charging voltage to control the charging circuit.
It is noted that the pwm signal is square-wave signal.
In some embodiments, the pwm circuit stops output pwm signal or the duty ratio of the pwm signal is adjusted to 0 or 100% according to first feedback signal, stops generating charging voltage to control the charging circuit；The pwm circuit exports the pwm signal according to second feedback signal, generates charging voltage to control the charging circuit.
In some embodiments, the charging circuit includes: switch element and transformer；The switch element is connect with the primary side of the transformer, and the switch element receives the pwm signal and is periodically turned off, is connected according to the pwm signal, receives the power supply input signal to control the primary side of the transformer；The secondary side of the transformer generates charging voltage, and export through the power pin according to the received power supply input signal of primary side institute of the transformer.
In some embodiments, the feed circuit is comparison circuit, operational amplification circuit or analog to digital conversion circuit, wherein, two input terminals of the feed circuit are connected to the both ends of the Sampling device, to obtain the level signal, the output end of the feed circuit is connect with the switching device, to pass to the feedback signal to the switching device.
In some embodiments, the charger further include: at least one pressure regulation device, the pressure regulation device are serially connected in the input line of the feed circuit.The pressure regulation device provides a reference voltage, which provides a detection error permissible range.
In some embodiments, the pressure regulation device is benchmark voltage source.
In some embodiments, the charger further include: capacitor, the capacitance series are in the input line of the feed circuit.The principle gradually to be charged using the capacitor, when the level signal for meeting preset condition, which inputs, to be more than certain time or have continuous multiple level signal inputs for meeting preset condition, the input wiring terminal of the feed circuit can just reach the level value of response, respective feedback signal is generated, erroneous judgement caused by interference voltage is avoided.
In some embodiments, the detection signal generating circuit are as follows: circuit, square wave occur for direct current signal Circuit occurs for signal generating circuit, pulse signal generation circuit or half-wave signa.
In some preferred embodiments, the detection signal generating circuit passes through output alternating-current detection signal, Sampling device is added in the loop simultaneously, feed circuit is acquired the AC signal on Sampling device, detected using alternating-current detection signal, its energy is low, and cable will not be caused to damage, meanwhile, by the pulse for sampling multiple AC signals, sampling precision can be further increased, avoids the problem that single judgement easily causes erroneous judgement.
In some embodiments, the Sampling device is sampling resistor or sampling inductance.
It is noted that the detection signal generating circuit can also continuously or periodically export detection signal, feed circuit with duration or can also periodically detect the level signal at Sampling device both ends, realize abnormal protection in real time.
In some embodiments, the switch element is NMOS tube.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, attached drawing needed in describing below to embodiment is briefly introduced.It should be evident that drawings in the following description are only some embodiments of the invention, and it is not all.For those of ordinary skill in the art, under the premise of not making the creative labor, other attached drawings be can also be obtained according to these attached drawings.
The illustrative structural block diagram of the charger provided according to some embodiments is shown respectively in Fig. 1 to Fig. 5；
The illustrative structural block diagram of the feed circuit provided according to some embodiments is shown respectively in Fig. 6 and Fig. 7；
Fig. 8 shows the illustrative structural block diagram of the charging circuit and switching device that provide according to some embodiments.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is described further.
Embodiment to facilitate the understanding of the present invention introduces several relevant concepts first:
1) pulse width modulation (Pulse Width Modulation, PWM)
PWM is a kind of analog control mode, it is according to the variation of corresponding load come the biasing of modulation transistor base stage or metal-oxide-semiconductor grid, to realize the change of transistor or metal-oxide-semiconductor turn-on time, to realize the change of switching power supply output, this mode can be such that the output voltage of power supply keeps constant in operation conditions change, be a kind of very effective technology controlled using the digital signal of microprocessor analog circuit.
PWM includes phase voltage control PWM, pulsewidth PWM method, random PWM, SPWM method, line voltage control PWM etc., in nickel-hydrogen battery smart charger, generally use pulsewidth PWM method, it is spike train that each pulse width is equal as PWM waveform, the period for changing spike train can be with frequency modulation, the width or duty ratio for changing pulse can be exactly time scale shared by high level in a pulse period with pressure regulation, duty ratio, such as 1 second high level, 1 second low level PWM wave duty ratio are 50%.Voltage and frequency coordination can be made to change using suitable control method, therefore, by adjusting period of PWM, the duty ratio of PWM, can achieve the purpose of control charging voltage.
Metal-oxide-semiconductor is metal (metal)-oxide (oxide)-semiconductor (semiconductor) field effect transistor, is now widely used switching device, switching speed with higher.
The case where when two o'clock that short-circuit (Short Circuit) refers to that potential is different in normal circuit is improperly directly abutted against or connected by impedance (or resistance) very small conductor.Short circuit can be understood as foring a low impedance path between two o'clock in circuit.Such as when charger charging interface is intake or into other conductive bodies formation low impedance path, then causes charging interface short-circuit.
The charger that there is provided according to some embodiments of the invention and charging method for detecting abnormality, it is unrelated with the working condition of charger, when there is electronic equipment connect with charger, it may be assumed that when charger is electronic equipment charging；Or it is connect without electronic equipment with charger, it may be assumed that equally applicable when charger is in light condition.
In conjunction with above, according to the charger that some embodiments provide, the charger includes: detection signal generating circuit, Sampling device, feed circuit, switching device, charging circuit and charging interface；The charging interface includes data transmission pin and power pin；The charging circuit receives power supply input signal, and generates the charging voltage according to the power supply input signal, and the charging voltage is defeated through the power pin Out；The detection signal generating circuit is connect for exporting detection signal, the output end of the detection signal generating circuit with data transmission pin；The Sampling device is serially connected with the output line of the detection signal generating circuit；The feed circuit is connect with the Sampling device and the switching device, generates feedback signal for detecting the level signal at the Sampling device both ends, and according to the level signal, the feedback signal is passed to switching device；The switching device is serially connected with the power input line of the charging circuit or is serially connected with the connecting line of the charging circuit Yu the power pin, the switching device controls the charger according to the feedback signal and exports charging voltage for receiving the feedback signal；Wherein, when the level signal meets preset condition, the feed circuit generates the first feedback signal, and the switching device controls the charger according to first feedback signal and stops output charging voltage；When the level signal is unsatisfactory for the preset condition, the feed circuit generates the second feedback signal, and the switching device controls the charger according to second feedback signal and exports charging voltage.
Fig. 1 shows the brief configuration schematic diagram of the charger provided according to some embodiments.As shown in Figure 1, charger includes switching device 100, charging circuit 200, detection signal generating circuit 300, Sampling device 400, feed circuit 500 and charging interface 700.
In some embodiments, the charging interface 700 can be Micro USB interface, that is a portable version of the standard of universal serial bus 2.0 (USB 2.0), the charging interface 700 generally include power pin Vbus, ground pin GND and two data transfer tube feet D+ and D-.In addition, the interface of the Type C standard collocation defined for universal serial bus 3.1 (specification of USB 3.1), the charging interface 700 can also include other signal wires that Type-C interface defines.
It should be noted that, the embodiment of the present invention is schematically illustrate by taking Micro USB charging interface as an example, rather than limitation of the present invention, after having read present patent application, the scheme of the embodiment of the present invention can be applied to the charging interface of other types (such as USB Type-C) without creative efforts by those skilled in the art.
In some embodiments, the charger can also include microprocessor (not shown), during the charging process, the microprocessor transmits pin by the data and is communicated with equipment is electrically charged, to obtain the charging status information for being electrically charged equipment, adjust charging current at any time, realized with cooperation dodge fill, the functions such as fast charge.
The charger further includes charging plug 600, AC/DC converting circuit (not shown) and voltage conversion circuit (not shown).The charging plug 600 of charger is connect with external power supply power supply, the AC/DC converting circuit in the charged device of external communication electricity is converted to direct current, voltage is being adjusted by the voltage conversion circuit, form power supply input signal, the power supply input signal is inputted from the power input line Vin+ and Vin- of charging circuit 200, the charging circuit 200 exports charging voltage to power pin Vbus, and charger exports charging voltage from power pin Vbus.
In some embodiments, two output ends of the detection signal generating circuit 300, connect data transmission pin (D+ or D-) and the ground pin GND respectively, the detection signal generating circuit 300 is used to issue detection signal through data transmission pin (D+ or D-) output；The Sampling device 400 is serially connected on an output line of the detection signal generating circuit 300, the pin D+ and/or D- and ground pin GND is transmitted when the data and forms access, and feed circuit 500 can collect the level signal in response to the detection signal from the Sampling device 400.
The detection signal generating circuit 300 issues detection signal.The detection signal generating circuit 300 is that circuit occurs for direct current signal, and the detection signal of output is direct current signal, and correspondingly, sampled signal is also direct current signal.
In some embodiments, the detection signal generating circuit 300 is that circuit occurs for AC signal (AC signal), can be square-wave signal generation circuit, circuit or pulse signal generation circuit occur for half-wave signa.
The Sampling device 400 is serially connected with the output line of the detection signal generating circuit 300.
In some embodiments, as shown in Figure 1, the output end of the detection signal generating circuit 300 connects the data and transmits pin D+, the detection signal generating circuit 300 is used to export the detection signal through data transmission pin D+, and the Sampling device 400 is serially connected on the output line of the detection signal generating circuit 300 connecting with data transmission pin D+.
In some embodiments, as shown in Figure 2, one of output end of the detection signal generating circuit 300 connects the data and transmits pin D-, and the Sampling device 400 is serially connected on the output line of the detection signal generating circuit 300 connecting with data transmission pin D-.
In some embodiments, such as Fig. 3, the output end of the detection signal generating circuit 300 is connected on the data transmission pin D+, and the Sampling device 400 is serially connected with the detection signal generating circuit 300 On the connecting line of the ground pin GND.In addition, the output end of the detection signal generating circuit 300 also may be coupled on the data transmission pin D-, the Sampling device 400 is serially connected on the connecting line of the detection signal generating circuit 300 and the ground pin GND.
The feed circuit 500 is connect with the Sampling device 400 and the switching device 100, generates feedback signal for detecting the level signal at 400 both ends of Sampling device, and according to the level signal, the feedback signal is passed to switching device 100.
The feed circuit 500 can be comparator, operational amplifier or adc circuit (Analog-to-Digital Converter, analog to digital conversion circuit).
Fig. 6 shows the illustrative structural block diagram of the feed circuit provided according to some embodiments；Two input terminals of the feed circuit 500 are separately connected the both ends of the Sampling device 400, to detect the level signal of Sampling device 400 ends A 1 and A2, the feed circuit 500 generates feedback signal according to the level signal, and the Sampling device 400 can be resistance or inductance.
Feed circuit 500 judges whether detected level signal meets preset condition (such as: the level signal is greater than the preset threshold), when the level signal meets preset condition, feed circuit generates the first feedback signal, and first feedback signal is passed into switching device, the switching device controls the charger according to first feedback signal and stops output charging voltage.
In some embodiments, the feed circuit 500 exports the feedback signal of low and high level according to comparison result respectively, when the feed circuit 500 exports the first feedback signal (such as low level), pass through control switch device 100, directly to disconnect the access in the input path of the power supply input signal of charging circuit 200 or the output line of power cutoff pin Vbus, stop output charging voltage to control the charger；When the feed circuit 500 exports the second feedback signal (such as high level), pass through control switch device 100, with connect the input path of the power supply input signal of charging circuit 200 or power on pin Vbus output line access so that the charger export charging voltage.
First feedback signal is low level, then second feedback signal is high level；First feedback signal is high level, then second feedback signal is low level；It can specifically be adaptively adjusted according to the design needs.
For ease of description, in the embodiment of the present invention, using the first feedback signal as low level, the second feedback signal is for high level.
Fig. 7 shows the illustrative structural block diagram of the feed circuit provided according to some embodiments；The charger further include: pressure regulation device 502 (such as reference voltage source or partial pressure device).Wherein, an input terminal U2 of the feed circuit 500 is connect with one end of the voltage regulation component 502, and the other end of the pressure regulation device 502 is connect with one end A2 of the Sampling device 400；Another input terminal U1 of the feed circuit 500 is connect with one end A1 of the sample circuit 400, and the output end U0 of the feed circuit 500 is connect with the switching device 100.In some embodiments, the pressure regulation device 502 provides a detection error permissible range, avoids erroneous judgement caused by interference voltage.The level value for being connected to an input terminal U2 of the feed circuit 500 of pressure regulation device 502 is not less than the level value of another input terminal U1, the feed circuit 500 exports the second feedback signal (i.e. Normal Feedback signal, such as: high level), second feedback signal can make the switching device 100 connect the connection of the charging circuit Yu the power pin, or connect the input path of the power supply input signal of the charging circuit, that is: the described charging circuit 200 generates charging voltage, and exports charging voltage to the power pin；When charging interface is abnormal short circuit, that is: when short circuit occurs between the data transmission pin and earth signal of charging interface, the electric current for flowing through the Sampling device 400 can increase extremely, then the level difference value of 400 ends A 1 of Sampling device and A2 can be more than preset threshold, this variation makes the height of the voltage value of two input terminals of feed circuit 500 change, that is level value of the level value of input terminal U1 higher than another input terminal U2, the second feedback signal that the output end U0 of feed circuit 500 is exported will be flipped, overturning is the first feedback signal (i.e. abnormal feedback signal, such as: low level), first feedback signal can make the switching device 100 disconnect the charging circuit power supply input signal input path, that is: charging circuit can not generate charging voltage；Or the connection of the charging circuit Yu the power pin is directly disconnected, so that charger is stopped output charging voltage, to realize short-circuit detecting and protection.
In conjunction with Fig. 7, in some embodiments, increase by a capacitor C between one end A1 of sample circuit 400 and the input terminal U1 of feed circuit 500p, capacitor CpWith certain charging time, feed circuit 500 can reach after a certain period of time in one end A1 curent change of sample circuit 400, the first feedback signal (i.e. abnormal feedback signal) of output switching activity, avoids interference signal from causing erroneous detection, causes charger to stop output and fill Piezoelectric voltage.
In some embodiments, the detection signal that the detection signal generating circuit 300 exports is AC signal, and feed circuit 500 can utilize the capacitor C with the level signal at repeated detection Sampling device 400 (inspection leakage resistance etc.) both endspThe principle gradually to charge, when the duration that level signal meets preset condition be more than the level signal that detects of preset time or at least continuous n times all meet preset condition (can be according to the design needs, be adaptively adjusted and the value of customized N) when, the input wiring terminal of the feed circuit can just reach the level value of response, generate respective feedback signal, when to meet the duration of preset condition be more than that the level signal that detects of preset time or at least continuous n times all meets preset condition to detecting the level signal at Sampling device both ends when feed circuit 500, export the first feedback signal (i.e. abnormal feedback signal, such as: low level), pass through the level signal at 400 both ends of repeated detection Sampling device, sampling precision can be further increased, avoid the problem that single judgement easily causes erroneous judgement.In addition, the detection signal that detection signal generating circuit 300 exports is that AC signal will not cause to damage since the energy of AC signal is low to cable.
In the transmission of no data, the data transmission pin D+ is connected with data-signal no on D-, therefore, impedance between the data transmission pin D+ and D- and ground pin GND is very high or direct disconnection, therefore the signal value of the level signal on the Sampling device 400 is less than preset threshold or even 0, when the charging interface 700 is because intaking or in the presence of will lead to short-circuit foreign matter, data transmission the pin D+ and D- can connect to form short circuit or low impedance path with the ground pin GND, that is: the impedance between the data transmission pin D+ and D- and ground pin GND reduces, therefore, detect signal generating circuit, current loop is formed between Sampling device and data transmission pin and GND pin.At this point, based on the detection signal that detection signal generating circuit is exported, the level signal at Sampling device both ends is greater than preset threshold.By setting a preset condition, the preset condition may be greater than a preset threshold, when the level signal meets the preset condition (the i.e. described level signal is greater than the preset threshold), the feed circuit 500 generates the first feedback signal, when the level signal is unsatisfactory for the preset condition (the i.e. described level signal is less than the preset threshold), the feed circuit 500 generates the second feedback signal.In some embodiments, first feedback signal is high level, second feedback signal is low level or first feedback signal is low level, second feedback signal is high level.
The switching device 100 is serially connected with the power input line of the charging circuit 200 or is serially connected with described The connecting line of charging circuit 200 and the power pin Vbus, the switching device 100 control the charger according to the feedback signal and export charging voltage for receiving the feedback signal.
In some embodiments, the switching device 100 controls the mode that charger stops output charging voltage, it may include: the input path for disconnecting the power supply input signal of the charging circuit 200, it controls charging circuit 200 to stop charging conversion work or disconnect the connection of charging circuit 200 and power pin Vbus, to stop the charging voltage that charging circuit 200 is exported to the power pin Vbus.
In some embodiments, the switching device 100, which can be transistor, field-effect tube etc., can make the device switched, turn off charging voltage by way of direct cut-off signal access.
Specifically, in conjunction with FIG. 1 to FIG. 3, the switching device 100 can also be serially connected with the power input line Vin- of the charging circuit 200, or, as shown in Figure 4, the switching device 100 is serially connected with the power input line Vin+ of the charging circuit 200, and the switching device 100 disconnects the input path of the power supply input signal of the charging circuit 100 according to first feedback signal, so that the charging circuit 100 stops generating charging voltage；The input path of the power supply input signal of the charging circuit 100 is connected according to second feedback signal, so that the charging circuit 100 generates charging voltage, and is exported through the power pin Vbus.
In some embodiments, as shown in Figure 5, the switching device 100 is serially connected on the connecting line of the charging circuit 200 and power pin Vbus, the switching device 100 disconnects the connection of the charging circuit 200 and power pin Vbus according to first feedback signal, and the power pin Vbus stops output charging signals；The switching device 100 connects the connection of the charging circuit 200 and power pin Vbus according to second feedback signal.
Furthermore, in some embodiments, when the switching device 100 is set to the power input line Vin+ of the charging circuit 200, the Sampling device 400 is also serially connected with the output line of the detection signal generating circuit 300, can be with the data transmission pin D- output line connecting or transmits the output line that pin D+ is connect with the data；In some embodiments, when the switching device 100 is set on the connecting line of charging circuit 200 and the power pin Vbus, the Sampling device 400 can also be serially connected with the output line of the detection signal generating circuit 300, can be with the data transmission pin D- output line connecting or transmit the output line that pin D+ is connect with the data.
In some embodiments, the switching device 100 can also be pwm circuit, and the pwm circuit is for generating pwm signal, wherein the pwm signal is preferably square-wave signal, and the pwm signal can control the charging circuit 200 and generate charging voltage.
Specifically, the pwm circuit can normally generate charging voltage according to the pwm signal according to the second feedback signal output pwm signal, the charging circuit 200, i.e., provide charging voltage to power pin Vbus.The pwm circuit stops output pwm signal according to first feedback signal or the duty ratio of the pwm signal is adjusted to 0 or 100%, and the charging circuit 200 then stops exporting charging voltage, that is, stops providing charging voltage to power pin Vbus.
It is pwm circuit with the switching device 100, is serially connected with for the input line Vin- of the charging circuit, Fig. 8 shows the illustrative structural block diagram of the charging circuit 200 provided according to some embodiments；The charging circuit 200 includes: switch element 202 and transformer 201；The switch element 202 is connect with the primary side of the switching device 100, the transformer 201 with power input line Vin+ respectively, and the switch element 202 receives input signal according to the primary side that the pwm signal periodically controls the transformer 201；Two, the secondary side output end of the transformer meets the power pin Vbus and ground pin GND respectively, generates charging voltage according to the received input signal of the primary side of transformer institute, and charging voltage is exported to the power pin Vbus.
In conjunction with Fig. 6, primary side N of the power supply input signal from transformerPInput terminal input, with switch element 202 periodically conducting, disconnect, transformer answers side NSInduction generates output signal.The switching device 100 sends pwm signal, control switch element 202 periodically conducting, disconnection to switch element 202.If the switching device stops sending square-wave signal, the multiple side N of the transformer 201SGeneration output electric current can not be incuded, charger then stops charging voltage.In some embodiments, the primary side N of the transformer 201PA termination power input line Vin+, the other end meets another power input line Vin-, the multiple side N of the transformer 201 by the main switching transistorSA termination power pin Vbus, another termination ground pin GND.
In some embodiments, the switch element 202 is NMOS tube, including grid G, source S, drain D, and grid G connects the switching device 100, and source S meets power input line Vin-, and drain D meets the primary side N of the transformerP.The switching device 100 is by the grid G to switch element 202 Send control signal.
Such as aforementioned some embodiments, the control signal is square-wave signal, and when the square-wave signal is in high level, the drain D and grid G of NMOS tube are connected, and when the square-wave signal is in low level, the drain D and grid G of the NMOS tube are disconnected.
In conjunction with above embodiments; the abnormity protection circuit that there is the charger switching device 100, detection signal generating circuit 300, Sampling device 400 and feed circuit 500 to form; to protect charger because water inlet or foreign matter lead to impedance extremely and reduce, the problem of causing charger or be electrically charged equipment damage.
In addition, detection signal generating circuit 300 sustainably or periodically sends detection signal, feed circuit 500 continuously or periodically obtains the level signal at 400 both ends of Sampling device and sends feedback signal to the switching device 100.
According to the method that a kind of charger using previous embodiment that some embodiments provide realizes charging abnormal protection, the described method comprises the following steps:
Step S11: the detection signal generating circuit 300 issues detection signal；
Step S12: the feed circuit 500 obtains level signal from the Sampling device 400, and generates feedback signal according to the level signal；
Step S14: the switching device 100 receives the feedback signal, and controls the charger according to the feedback signal and export charging voltage.
Wherein, when the level signal meets preset condition, the feed circuit 500 generates the first feedback signal, and the switching device 100 controls the charger according to first feedback signal and stops output charging voltage；When the level signal is unsatisfactory for the preset condition, the feed circuit 500 generates the second feedback signal, and the switching device 100 controls the charger according to second feedback signal and exports charging voltage.
In conclusion the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to above-described embodiment, invention is explained in detail, those skilled in the art should understand that: it can still modify to technical solution documented by the various embodiments described above or equivalent replacement of some of the technical features；And these are modified or replaceed, and do not make corresponding technical solution Essence depart from the spirit and scope of the technical scheme of various embodiments of the present invention.
All or part of function of detection signal generating circuit, Sampling device, feed circuit, switching device, charging circuit, pressure regulation device, capacitor in the embodiment of the present invention can be realized by processor or controller chip, can also be realized by discrete device.
The high low state of the level relationship provided in the embodiment of the present invention, voltage value size relation and logic level is a kind of realization of the embodiment of the present invention, and each parameter value can need to carry out adjustment appropriate according to circuit.
In the present embodiment, reference voltage can both indicate reference voltage source, may also indicate that the level value of reference voltage.The level value size relation provided in the embodiment of the present invention is a kind of realization of the embodiment of the present invention, and each parameter value can need to carry out adjustment appropriate according to circuit.
The term used in embodiments of the present invention is only to be not intended to limit the invention merely for for the purpose of describing particular embodiments.It is also intended to including most forms, unless the context clearly indicates other meaning in the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the".It is also understood that term "and/or" used herein refers to and includes that one or more associated any or all of project listed may combine.
It should be noted that, in embodiments of the present invention, the relational terms such as first, second are only used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying there are any actual relationship or orders between these entities or operation.And, the terms "include", "comprise" or any other cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those elements, it but also including other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.In the absence of more restrictions, the element limited by sentence " including ... ", " including ... ", it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment may be implemented by hardware, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer readable storage medium, storage medium mentioned above can be read-only memory Disk or CD etc..
Above-described specific embodiment; the purpose of the present invention, technical solution beneficial effect are had been further described; it should be understood that; different embodiments can be combined; described above and then a specific embodiment of the invention, is not intended to limit the scope of protection of the present invention, all within the spirits and principles of the present invention; any combination, modification, equivalent replacement, improvement for being made etc., should all be included in the protection scope of the present invention.The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment may be implemented by hardware, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer readable storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..

Claims (14)

  1. A kind of charger, wherein the charger includes: detection signal generating circuit, Sampling device, feed circuit, switching device, charging circuit and charging interface；
    The charging interface includes data transmission pin and power pin；
    The charging circuit receives power supply input signal, and generates charging voltage according to the power supply input signal, and the charging voltage is exported through the power pin；
    The detection signal generating circuit is connect for exporting detection signal, the output end of the detection signal generating circuit with data transmission pin；
    The Sampling device is serially connected with the output line of the detection signal generating circuit；
    The feed circuit is connect with the Sampling device and the switching device, generates feedback signal for detecting the level signal at the Sampling device both ends, and according to the level signal, the feedback signal is passed to switching device；
    The switching device is serially connected with the power input line of the charging circuit or is serially connected with the connecting line of the charging circuit Yu the power pin, the switching device controls the charger according to the feedback signal and exports charging voltage for receiving the feedback signal；
    Wherein, when the level signal meets preset condition, the feed circuit generates the first feedback signal, and the switching device controls the charger according to first feedback signal and stops output charging voltage；When the level signal is unsatisfactory for the preset condition, the feed circuit generates the second feedback signal, and the switching device controls the charger according to second feedback signal and exports charging voltage.
  2. Charger according to claim 1, wherein the switching device is serially connected with the connecting line of the charging circuit Yu the power pin,
    The switching device disconnects the connection of the charging circuit Yu the power pin according to first feedback signal；The switching device connects the connection of the charging circuit Yu the power pin according to second feedback signal.
  3. Charger according to claim 1, wherein the switching device is serially connected with the power input line of the charging circuit,
    The switching device disconnects the input path of the power supply input signal of the charging circuit according to first feedback signal；The switching device connects the input path of the power supply input signal of the charging circuit according to second feedback signal.
  4. Charger according to claim 3, wherein
    The switching device is pwm circuit, and pwm circuit described in power input line is for generating pwm signal.
  5. Charger according to claim 4, wherein the pwm circuit stops output pwm signal or the duty ratio of the pwm signal is adjusted to 0 or 100% according to first feedback signal, stops generating charging voltage to control the charging circuit；The pwm circuit exports the pwm signal according to second feedback signal, generates charging voltage to control the charging circuit.
  6. Charger according to claim 4 or 5, wherein the pwm signal is square-wave signal.
  7. Charger according to claim 6, wherein the charging circuit includes: switch element and transformer；
    The switch element is connect with the primary side of the transformer, and the switch element receives the pwm signal and is periodically turned off, is connected according to the pwm signal, receives the power supply input signal to control the primary side of the transformer；
    The secondary side of the transformer generates charging voltage, and export through the power pin according to the received power supply input signal of primary side institute of the transformer.
  8. Charger according to any one of claim 1 to 7, wherein the feed circuit is comparison circuit, operational amplification circuit or analog to digital conversion circuit, wherein
    Two input terminals of the feed circuit are connected to the both ends of the Sampling device, and to obtain the level signal, the output end of the feed circuit is connect with the switching device, to transmit the feedback signal to the switching device.
  9. Charger according to claim 8, wherein the charger further include:
    At least one pressure regulation device, the pressure regulation device are serially connected in the input line of the feed circuit.
  10. Charger according to claim 9, wherein the pressure regulation device is benchmark voltage source.
  11. The charger according to any one of claim 8 to 10, wherein the charger further include:
    Capacitor, the capacitance series are in the input line of the feed circuit.
  12. Charger according to any one of claim 1 to 11, wherein the detection signal generating circuit are as follows:
    Direct current signal occurs circuit, square-wave signal generation circuit, pulse signal generation circuit or half-wave signa and circuit occurs.
  13. Charger according to any one of claim 1 to 12, wherein the detection signal generating circuit periodically output detection signal.
  14. Charger according to any one of claim 1 to 13, wherein the Sampling device is sampling resistor or sampling inductance.
CN201680090005.5A 2016-10-14 2016-10-14 Charging device Active CN109804527B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110888168A (en) * 2019-11-20 2020-03-17 歌尔科技有限公司 Interface detection circuitry charges, intelligent wearing equipment and charging system
CN112070974A (en) * 2020-08-05 2020-12-11 深圳来电科技有限公司 Method and device for automatically checking abnormal conditions of charge pal, computer equipment and computer readable medium
CN112701750A (en) * 2020-12-21 2021-04-23 维沃移动通信有限公司 Connector, electronic equipment and control method and device of electronic equipment
WO2021213286A1 (en) * 2020-04-24 2021-10-28 深圳市韶音科技有限公司 Charging control circuit and acoustic output device
CN114710738A (en) * 2022-03-31 2022-07-05 深圳市微源半导体股份有限公司 Sweat detection method of TWS earphone based on communication mode
CN116087825A (en) * 2022-12-05 2023-05-09 江苏帝奥微电子股份有限公司 Charging interface foreign matter short circuit detection chip, detection device and method

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018090174A1 (en) 2016-11-15 2018-05-24 华为技术有限公司 Charging method and related device
EP3855193B1 (en) * 2018-10-10 2024-04-24 Huawei Technologies Co., Ltd. Method, circuit and electronic device for detecting water immersion
CN109560581B (en) * 2018-11-13 2020-12-01 Oppo广东移动通信有限公司 Charging processing method, charging processing circuit, electronic device, and storage medium
CN110554240A (en) * 2019-09-09 2019-12-10 Oppo（重庆）智能科技有限公司 Impedance detection circuit and method for charging interface and terminal equipment
US11334133B2 (en) * 2020-04-24 2022-05-17 Dell Products L.P. Power management of voltage regulators in an information handling system
CN112290610B (en) * 2020-08-25 2022-08-16 歌尔科技有限公司 Charging control circuit and charging control method
CN116599195B (en) * 2023-07-14 2023-10-27 东莞市奥海科技股份有限公司 Charging circuit with storage function and charger

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2228884A2 (en) * 2009-03-12 2010-09-15 O2 Micro, Inc. Circuits and methods for battery charging
CN101945534A (en) * 2010-09-01 2011-01-12 惠州Tcl移动通信有限公司 Method and circuit for protecting circuit board in case of water inflow of mobile terminal and mobile terminal
CN103532187A (en) * 2013-09-29 2014-01-22 小米科技有限责任公司 Charger, charging line, charging system and charging method
CN104767260A (en) * 2015-03-30 2015-07-08 华为技术有限公司 Charger, terminal device and charging system
WO2016106616A1 (en) * 2014-12-31 2016-07-07 华为技术有限公司 Charging protection method and apparatus
CN205610274U (en) * 2016-04-29 2016-09-28 维沃移动通信有限公司 Short -circuit protection circuit and electronic equipment charge
WO2016153576A1 (en) * 2015-03-20 2016-09-29 Dialog Semiconductor Inc. Soft-short overvoltage protection for data lines in quick charge usb charger

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6099894B2 (en) 2012-07-11 2017-03-22 セミコンダクター・コンポーネンツ・インダストリーズ・リミテッド・ライアビリティ・カンパニー Portable electronic device charging system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2228884A2 (en) * 2009-03-12 2010-09-15 O2 Micro, Inc. Circuits and methods for battery charging
CN101945534A (en) * 2010-09-01 2011-01-12 惠州Tcl移动通信有限公司 Method and circuit for protecting circuit board in case of water inflow of mobile terminal and mobile terminal
CN103532187A (en) * 2013-09-29 2014-01-22 小米科技有限责任公司 Charger, charging line, charging system and charging method
WO2016106616A1 (en) * 2014-12-31 2016-07-07 华为技术有限公司 Charging protection method and apparatus
WO2016153576A1 (en) * 2015-03-20 2016-09-29 Dialog Semiconductor Inc. Soft-short overvoltage protection for data lines in quick charge usb charger
CN104767260A (en) * 2015-03-30 2015-07-08 华为技术有限公司 Charger, terminal device and charging system
CN205610274U (en) * 2016-04-29 2016-09-28 维沃移动通信有限公司 Short -circuit protection circuit and electronic equipment charge

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110888168A (en) * 2019-11-20 2020-03-17 歌尔科技有限公司 Interface detection circuitry charges, intelligent wearing equipment and charging system
CN110888168B (en) * 2019-11-20 2022-05-13 歌尔科技有限公司 Interface detection circuitry charges, intelligent wearing equipment and charging system
WO2021213286A1 (en) * 2020-04-24 2021-10-28 深圳市韶音科技有限公司 Charging control circuit and acoustic output device
CN112070974A (en) * 2020-08-05 2020-12-11 深圳来电科技有限公司 Method and device for automatically checking abnormal conditions of charge pal, computer equipment and computer readable medium
CN112701750A (en) * 2020-12-21 2021-04-23 维沃移动通信有限公司 Connector, electronic equipment and control method and device of electronic equipment
CN114710738A (en) * 2022-03-31 2022-07-05 深圳市微源半导体股份有限公司 Sweat detection method of TWS earphone based on communication mode
CN114710738B (en) * 2022-03-31 2023-03-24 深圳市微源半导体股份有限公司 Sweat detection method of TWS earphone based on communication mode
CN116087825A (en) * 2022-12-05 2023-05-09 江苏帝奥微电子股份有限公司 Charging interface foreign matter short circuit detection chip, detection device and method
CN116087825B (en) * 2022-12-05 2023-09-29 江苏帝奥微电子股份有限公司 Charging interface foreign matter short circuit detection chip, detection device and method

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US10998741B2 (en) 2021-05-04
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US20200052510A1 (en) 2020-02-13
EP3522332A4 (en) 2019-09-25
WO2018068323A1 (en) 2018-04-19

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